JP2010197098A - Iceball launcher and hailstorm testing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an iceball launcher having a stable directionality without destroying an ice ball and a hailstorm testing method. <P>SOLUTION: The iceball launcher 18 for launching an ice ball 2 from the end of an orbit 3 by applying an impulsive forth to the iceball 2 on the linear orbit 3 and accelerating the iceball 2 by the impulsive force includes an ice ball guide 1 for holding the iceball 2 until the iceball is launched, wherein the iceball guide 1 is linearly movably disposed on the orbit 3 and contacts the iceball 2 on a plane to the linear movement direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ice ball launching apparatus and a falling test method for causing an ice ball imitating a kite to collide with a test object, and more particularly to an apparatus and method for evaluating the mechanical performance of a solar cell panel against a kite.

  As an evaluation of solar cell panels and solar cell modules, tests such as electrical performance, mechanical performance, and environmental resistance characteristics are performed. Among them, JIS C 8938-1995 (Non-patent Document 1) defines a test for examining the mechanical strength against the impact of the kite, which is called a hail test, as a test for evaluating the mechanical performance. In this standard, although there are descriptions about the conditions of the test apparatus and the test method, no specific apparatus configuration is described. Moreover, as an example of a mechanism of a device for firing an ice ball, a pneumatic type and a spring type are cited.

  Moreover, in the said nonpatent literature 1, as a simple test method, the test method which makes a steel ball fall from the predetermined position to the dropping point of the solar cell panel installed horizontally instead of an ice ball, and confirms a damage condition. It is prescribed. Since this simple test method does not require a special device, conventionally, this test method has often been used.

  In addition, in a descending test in which an ice ball collides with a solar cell panel, a device that launches the ice ball by gas pressure may be used. Some devices that give speed to ice spheres with such compressed gas are provided with a pressure regulating valve in order to control the speed (Patent Document 1).

JP 2006-47131 A

JIS C 8938-1995 (Appendix 7 Fall hail test (A-8))

  However, in recent years, with technological advancement, it has become possible to perform limit design for solar cell panels, and with a simple test that hits a steel ball specified in JIS (Non-Patent Document 1), which has been conventionally performed, quality requirements In order to satisfy the above, there is a problem that the design is excessive in strength. In the case of a bag, energy is consumed by the bag itself being destroyed by collision, so that the energy received by the solar cell panel is relaxed and the solar cell panel is not destroyed. However, when using a steel ball as defined in the above-mentioned simple test, the steel ball will not be destroyed by collision, so the solar panel receives all the collision energy, and the solar cell panel is destroyed. The Therefore, the solar cell panel is designed so as not to be destroyed by a simple test, but this results in excessive strength quality and is not realistic.

For this reason, instead of a simple test, a test method in which an ice ball is launched from the launching device and collides with the panel is employed. To this end, a device for firing the ice ball is required.
When carrying out the test method defined in JIS (Non-patent Document 1), in an apparatus that launches ice spheres with compressed gas as in Patent Document 1, in order to hold the compressed gas, the airtightness and strength of the launch tube Is required, and a compressor is also required. In addition, in the case of such a device configuration, in many cases, the speed of the ice sphere is controlled by adjusting the amount of compression of the gas under the data of the speed sensor provided in the device. The whole is expensive.
However, since the yield test is performed to confirm the product specification, the frequency of the test is about once every few years when the product specification is updated. For this reason, it is not preferable that the test apparatus is expensive.

  Therefore, it is considered that the test can be carried out at a low cost if it is possible to use the spring type mentioned in JIS (Non-Patent Document 1) as another example of the launch mechanism. However, the spring type is different from the pneumatic type that is repelled by gas, and the launching member for repelling the ice ball must directly contact the ice ball to propagate the impact force. In the case of such a mechanism, there is a problem that the ice ball is destroyed by the striking force in the normal method and the test is not actually established, and it is difficult to adopt the spring type in the descending test. It was.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an ice ball launching device in which an ice ball does not break even when direct impact is applied, and a descending test method using the same. To do.

In order to solve the above problems, the ice ball launching apparatus and the descending test method of the present invention employ the following means.
That is, the ice ball launching apparatus according to the present invention applies a striking force to the ice ball on a straight orbit, applies a speed to the ice ball by the striking force, and launches the ice ball from the end of the orbit. In the ice ball launcher, the ice ball guide includes an ice ball guide that holds the ice ball until the ice ball is launched, and the ice ball guide is installed on the track so as to be linearly movable, and the linear motion direction is On the other hand, it is in contact with the ice ball on the surface.

  According to the present invention, the ice sphere moves linearly together with the ice sphere guide so that the ice sphere guide installed on the orbit moves linearly with the ice sphere guide. At this time, the ice sphere is held in contact with the ice sphere guide in a plane with respect to the movement direction of the ice sphere guide. The energy stored in the ice ball launcher is released instantaneously and acts on the ice ball guide to try to excite the linear motion of the ice ball guide. At the moment when energy is applied just before the ice ball guide starts linear motion, a striking force acts on the ice ball guide. Since the ice ball guide and the ice ball are in contact with each other on the surface, the ice ball can receive a hitting force on the surface. Since the ice sphere is in contact with the ice sphere guide on the surface and the impact force is propagated, the stress generated in the ice sphere is much smaller than when the contact is received at the point and the impact force is received. Therefore, the generated stress of the ice sphere can be reduced, so that the ice sphere is not destroyed. Since the ice ball is not destroyed, the striking force is converted into kinetic energy, and the ice ball can move linearly with the ice ball guide.

In the above invention, the surface where the ice ball guide and the ice ball contact is formed in accordance with the surface shape of the ice ball.
Since the surface where the ice sphere guide and the ice sphere are in contact with each other is formed in accordance with the shape of the ice sphere, the ice sphere can be received as large as possible. Further, when the shape of the ice sphere is determined, the ice sphere guide can be manufactured in advance, so that it is not necessary to carry out the work for receiving on the surface.

Said invention WHEREIN: The said surface where the said ice ball guide and the said ice ball contact is formed of the buffer material, It is characterized by the above-mentioned.
Since the cushioning material is sandwiched between the surface where the ice ball guide and the ice ball contact, the cushioning material is crushed by the impact force and the inertial force of the ice ball acting in the direction opposite to the direction of the attack force. It is. Since the cushioning material is crushed from the portion in contact with the ice ball, the ice ball is in a form that is embedded in the cushioning material. The ice sphere that has sunk into the cushioning material is in surface contact with the cushioning material, and can receive impact on the surface. In addition, by using the buffer material, a common ice ball guide can be used for ice balls having different sizes and shapes.

In the above invention, the ice ball guide has an inner diameter that is substantially the same as that of the ice ball and has a cylindrical shape with a smooth inner surface.
At the time of launching, the ice sphere moves so as to slide on the inner surface from the back side in the cylindrical ice sphere guide being held toward the launch port side. The inner surface of the ice ball guide is smooth and does not hinder the movement of the ice ball. Moreover, a film of water is formed on the surface of the ice ball by a slight frictional force when the ice ball slides, and the frictional force is further reduced. Since the inner diameter of the ice ball guide is substantially the same as that of the ice ball guide, the ice ball held in the ice ball guide does not swing in the ice ball guide during the movement. Since the ice ball guide does not swing, the launch direction is stabilized. When the ice ball moves in the ice ball guide, there is no factor that makes the launch direction unstable, such as an obstruction or friction force, so that a stable direction of the ice ball can be obtained. Therefore, it can be launched with a stable direction without destroying the ice ball.

In the invention described above, the ice ball guide has an adapter that can be removed, and holds the ice ball through the adapter.
The ice ball guide has a removable adapter, and the adapter is manufactured according to the size of the ice ball. By providing an adapter structure for the ice ball guide, if you prepare an adapter that matches multiple types of ice balls, even if you change the size of the ice ball, it will match the size of each ice ball Can be held by the adapter. Accordingly, it is possible to perform a collision test on a plurality of types of ice balls simply by replacing the adapter.

In the above invention, the ice ball acceleration test apparatus is connected to the ice ball guide and deforms to store elastic force, and the linear shape is connected to the ice ball guide or the elastic body and maintains tension. And the striking force is such that tension is applied to the linear member, and the elastic force is accumulated by deformation of the elastic body in conjunction with the tension. Is generated by being released instantaneously.
When tension is applied to the linear member connected to the ice ball guide or the elastic body, the elastic body connected to the linear member directly or via the ice ball guide is deformed in conjunction with the linear member. The linear member only needs to have sufficient proof strength against the applied tension. Elastic force is accumulated in the deformed elastic body. Therefore, when the tension of the linear member is instantaneously released, the elastic force accumulated in the elastic body is also instantaneously released in conjunction with it. As a method of releasing instantaneously, there are a method of cutting the linear member and a method of locking the linear member and releasing the locking. The elastic force released instantaneously becomes a striking force and is applied to the ice ball guide holding the ice ball.

In the invention described above, the ice spheres are emitted toward a solar cell panel arranged to face each other at a predetermined interval.
In the solar cell panel product inspection, a rain test is conducted to confirm the durability against hail. By using the ice ball launching device of the present invention, it is possible to give a direct impact to the ice ball and launch it toward the solar cell panel. Therefore, it is easy to control the launch, and it is more reliable and simpler than the conventional device. It is possible to perform a rainfall test.

  Further, the descending test method according to the present invention includes an ice ball guide that is installed on a straight track so as to be linearly movable and holds the ice ball in contact with the surface. The ice ball is made to collide with the test object using an ice ball launcher that applies a speed to the ice ball by force and launches the ice ball from an end of the orbit.

  According to the present invention, when performing a descending test in which an ice ball collides with a test object, the ice ball guide provided on the straight track is held so that the ice ball is in contact with the surface, and the ice ball guide is attacked. The ice ball is launched toward the test object by the ice ball launching device that launches the ice ball by giving Since the ice ball guide and the ice ball are in contact with each other, no stress is generated that would destroy the ice ball even if it receives impact. And the ice ball launched from the ice ball launcher collides with the test object without being destroyed. Since the ice ball is not destroyed, it is possible to appropriately perform the descending test.

  According to the above-described invention, since the ice ball guide and the ice ball are brought into contact with each other on the surface, even if the impact force acts on the ice ball guide and propagates to the ice ball, no stress is generated locally on the ice ball. In addition, the ice ball is not destroyed, and it is possible to realize an ice ball launching device and a descending test that are launched with a very simple mechanism and with a safe and reliable direction. It can be manufactured at low cost.

It is a side view showing arrangement of an ice ball launcher concerning a 1st embodiment of the present invention, and a device under test. It is the partial cross section side view which showed the ice ball guide formed according to the shape of the ice ball of this invention. It is the partial cross section side view which showed the state which set the shock absorbing material between the ice ball guide and ice ball of this invention. It is the partial cross section side view which showed the state which set the shock absorbing material between the ice ball guide and ice ball of this invention, and the inner surface. It is the partial cross section side view which showed the state which set the adapter which has a buffer material in the ice ball guide of this invention. It is a top view showing arrangement of an ice ball launcher and a device under test concerning a 2nd embodiment of the present invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  First, the configuration of the first embodiment will be described. FIG. 1 shows a side view of a test arrangement of an ice ball launcher 18 and a solar cell panel 14 as a test object according to the first embodiment of the present invention during a descending test. The ice ball launcher 18 has an ice ball guide 1 for holding the ice ball 2.

  As shown in FIG. 2, the ice ball guide 1 includes an adapter 15 having a shape that matches the size of the ice ball 2. That is, the inner diameter of the adapter 15 is substantially equal to the outer diameter of the ice ball 2. The side surface inside the adapter 15 is a smooth inner surface with a small coefficient of friction. At this time, the adapter 15 has a removable structure (not shown) with respect to the ice ball guide 1.

The detachable structure of the adapter 15 is that the adapter 15 is fixed to the ice ball guide 1 during the linear motion, and the adapter 15 is removed from the ice ball guide 1 and replaced when the size of the ice ball 2 is changed. The adapter 15 can be removed from the ice ball guide 1. In the structure, a gap between the inner side surface of the ice ball guide 1 and the outer side surface of the adapter 15 is embedded with a holding material 19 (hard sponge material or the like). The adapter 15 is stably held by the ice ball guide 1 by the adapter 15 being pressed against the holding material. The ice ball guide 1 and the holding material may be fixed by an adhesive means such as a double-sided tape.
Instead of the holding material 19, any method such as a screw type, a flange fastening type, or a simple adhesion type structure may be used. The adapter 15 is preferably a case made of a resin such as plastic such as polyethylene, which is easy to handle.

  A cushioning material 5 is provided on the surface of the ice ball 2 held by the adapter 15 that receives a reaction force due to the striking force at the time of launch. The cushioning material 5 may be a generally used one, and may be a soft sponge or a general shock absorbing material. In a state where the ice ball 2 is set on the ice ball guide 1, the ice ball 2 and the buffer material 5 are in contact with each other at the contact portion 4 on the surface on which the impact force acts.

  In the present embodiment shown in FIG. 1, the elastic body 6 is represented by a coil spring that stores a compressive force. A track 3 is installed with respect to the elastic body 6, and the elastic body 6 is restricted by the track 3 from movement other than the elastic direction. In the present embodiment, the track 3 is a cylindrical firing tube containing a coil spring. A stopper 13 for preventing the ice ball guide 1 from deviating from the track 3 is provided at an end of the track 3 on the front side (right side in FIG. 1), and an end on the rear side (left side in FIG. 1) of the track 3 is provided. The part is provided with a reaction force receiver 17 for receiving a reaction force of the elastic force stored in the elastic body 6.

  Although not shown, the stopper 13 is provided with an opening such as a gap or an opening that allows the ice ball 2 to pass therethrough. The opening is sufficient if the ice ball 2 can pass through, and the shape and size are not particularly limited. And this opening part becomes a launching opening of the ice ball 2.

  On the outer rear side (left side in FIG. 1) of the ice ball guide 1, there are an elastic body 6, a rod 7 as a jig for pulling the ice ball guide 1 to the rear side in order to give elastic force to the elastic body 6, and a rod. A wire 8 as a linear member is connected and installed on the rear side (left side in FIG. 1) 7. A cutter 10 for cutting the wire 8 is installed beside the wire 8. Further, the outer periphery of the wire 8 on the front side (right side in FIG. 1) from the cutter 10 and the outer periphery of the connection portion between the chain block 9 and the wire 8 on the rear side (left side in FIG. 1) are provided with a protective cylinder. 11 and 12 are installed.

  A wire 8 is connected to the rear end side of the rod 7, and the rear end side of the wire 8 is hung on a chain block 9 as a drawing means. Moreover, although illustration is abbreviate | omitted, the chain block 9 is supported by the strong support | pillar or wall.

  Next, operations and effects according to the present embodiment having the above-described configuration will be described. First, the ice ball 2 is held by the adapter 15 provided in the ice ball guide 1. Next, when the chain of the chain block 9 is wound by power, the ice ball guide 1 is drawn rearward (to the left in FIG. 1), and the elastic body 6 is compressed to store elastic force.

  At this time, the elastic body 6 is linearly compressed because the movement direction is restricted by the track 3. A reaction force receiver 17 is provided at the rear side end of the track 3 and is in contact with the rear end of the elastic body 6. The reaction force receiver 17 is stored in the elastic body 6 as the elastic body 6 is compressed. Receives the reaction force of elastic force.

  The draw amount of the chain block 9 can be obtained by physical calculation from the elastic coefficient of the elastic body 6 and the final speed immediately before the ice ball 1 collides with the solar cell panel 14. The final speed of the ice ball 2 is defined by JIS (Non-Patent Document 1) and the like. At this time, the solar cell panel 14 is disposed with a predetermined gap between the solar cell panel 14 and the launch port in the vicinity of the stopper 13 of the ice ball launcher 18. Then, an ice ball 2 as a flying ball at this interval is photographed by a speed measuring device (not shown) using a high speed camera or the like, and the final speed is obtained. Furthermore, it is also possible to control the speed more precisely by feeding back the result and finely adjusting the amount of drawing.

  When the elastic body 6 is compressed and the moving amount of the ice ball guide 1 reaches a predetermined distance, the wire 8 is cut by the cutter 10. When the wire 8 is cut, the tension of the wire 8 is released, and the elastic force stored in the elastic body 6 is released momentarily. Then, the ice ball guide 1 is ejected forward along the track 3 together with the ice ball 2. Since the stopper 13 is installed at the front end of the track 3, the movement of the ice ball guide 1 is restricted so as not to deviate from the track 3.

  Further, if the wire 8 is cut by the cutter 10, the wire 8 or the chain block 9 may be repelled by the momentum of cutting and hit an operator around the apparatus, which is very dangerous. Therefore, by providing the protective cylinders 11 and 12, these dangers can be avoided. In addition, in this 1st Embodiment, although the wire 8 was cut | disconnected, the tension | tensile_strength which acts on the wire 8 was released instantaneously, It is not limited to this method, For example, a ring-shaped latching | locking part is attached to the wire 8. The locking portion is locked to the hanging member protruding from the installation base, and the chain block 9 is removed, and then the hanging member is tilted or penetrated to release the locking to instantly release the tension. It is also possible to release it automatically. In this case, since the wire 8 is not cut, the waste of material can be suppressed, and the trouble of replacing the wire 8 can be saved.

  When the wire 8 is cut by the cutter 10 and the ice ball guide 1 holding the ice ball 2 starts linear movement along the track 3, the cushioning material 5 is sandwiched between the surfaces where the ice ball guide 1 and the ice ball 2 are in contact with each other. Therefore, the shock absorbing material 5 is crushed by the inertial force of the impact force and the ice ball 2 acting in the direction opposite to the direction of the impact force. Since the buffer material 5 is crushed from the portion in contact with the ice ball 2, the ice ball 2 is in a form of being sunk into the buffer material 5. The ice sphere 2 sunk into the shock-absorbing material 5 comes into surface contact with the shock-absorbing material 5 and gradually receives impact force on the surface.

  Since the ice sphere 2 receives the striking force propagated from the ice sphere guide 1 by the surface, the stress acting on the ice sphere is remarkably reduced as compared with the case where the ice sphere 2 is received by a point. Therefore, the ice ball 2 is not destroyed by the impact force.

  After receiving the impact force, the ice ball guide 1 accelerates forward (to the right in FIG. 1) while holding the ice ball 2 on the surface, and reaches the stopper 13. The ice ball guide 1 that has reached the stopper 13 is forcibly stopped by the stopper 13. Since the ice sphere 2 is held by the ice sphere guide 1 but not fixed, the ice sphere 2 is installed in front of the stopped ice sphere guide 1 while maintaining the speed by the inertial force. Jump out to the panel. At this time, since the inner surface of the adapter 15 is formed so as to have a small friction coefficient, the ice ball 1 moves forward so as to slide inside the adapter 15.

  Since the inner surface of the ice ball guide 1 is smoothed, the ice ball 2 is not obstructed in the moving direction, so that the launch directionality is improved. Moreover, a thin water film melted from the ice sphere 1 is formed on the surface of the ice sphere 2 by a slight friction force when the ice sphere 2 slides, and the friction force is further reduced. This is similar to the principle that skis slide well on the snow.

  The inner surface of the adapter 15 only needs to be smoothly finished. However, when the adapter 15 is not a case made of a resin such as plastic as described above, particularly when the holding portion of the ice ball guide 1 is made of metal. Since the rust is generated by the water content of the ice sphere, it may cause friction between the ice sphere 2 and the rust, which may cause the directionality to become unstable. Therefore, the inner surface is preferably formed of a material that does not rust. Further, treatment such as application of a resin or application of a plastic material may be performed. Furthermore, before the test, it is preferable to clean the inner surface of the holding portion of the ice ball 2 in order to remove the friction factor.

  Further, since the inner diameter of the portion of the adapter 15 that holds the ice sphere 2 is substantially the same as that of the ice sphere 2, the ice sphere 2 held in the ice sphere guide 1 swings up and down and left and right during movement. There is no. Since the inside of the ice ball guide 1 does not swing, the firing direction can be further stabilized.

  Thus, when the ice ball 2 moves in the adapter provided in the ice ball guide 1, the ice ball 2 is removed by removing factors that make the launch direction unstable, such as an obstruction, frictional force, and rocking. Stable directionality can be obtained. If a plurality of adapters 15 having different inner diameters corresponding to the sizes of various ice balls 2 are prepared, the ice balls of various sizes can be obtained using the same ice ball guide 1 simply by replacing the adapter 15. 1 and the firing direction can be stabilized accordingly.

3 to 5 show other modified examples of the ice ball guide 1 when the adapter 15 is not used.
In FIG. 3, the portion of the ice ball guide 1 that holds the ice ball 2 is directly attached so that the ice ball 2 is held in contact with the ice ball guide 1 in a plane with respect to the movement direction of the ice ball guide 1. The partial side surface of the ice ball guide processed according to the shape of the ice ball 2 is shown. That is, the contact portion 4 has a curved surface shape that matches the ice ball 2.

  At the moment when the energy immediately before the ice ball guide 1 starts linear motion is applied, when the impact force acts on the ice ball guide 1, the ice ball guide 1 and the ice ball 2 come into contact with the surface of the contact portion 4. Therefore, the ice ball 2 can receive the hitting force on the surface. Therefore, since the generated stress of the ice sphere 2 can be reduced, the ice sphere 2 is not destroyed. Since the ice ball 2 is not destroyed, the striking force is converted into kinetic energy, and the ice ball 2 can move linearly with the ice ball guide 1. Since no cushioning material is required, it is easy to handle, for example, when the holding part of the ice ball 2 is cleaned, and there is no concern that the cushioning material loses its elasticity due to deterioration over time.

  4 and 5 show a modification using the buffer material 5 without using the adapter 15. When the adapter 15 cannot be prepared, as shown in FIG. 4, the effect can be expected only by providing the shock absorbing material 5 only on the surface on which the impact force acts. By using the cushioning material 5, it is possible to prevent the cushioning material 5 from being naturally changed to the shape of the ice sphere 2 due to acceleration to be in surface contact and being destroyed. For example, when the amount of spring deformation can be increased in a wide test field, the acceleration distance of the ice sphere 2 can be increased by using a spring having a small spring constant. In such a situation, since the ice ball guide 1 and the ice ball 2 are gently accelerated, the striking force is reduced and swinging is suppressed as compared with the case of a short acceleration distance. Therefore, the directionality is ensured for the ice spheres 2 having different sizes and shapes without using the adapter 15, and it becomes possible to conduct experiments on the ice spheres 2 of a plurality of sizes using the common ice sphere guide 1. .

  In addition, when it is desired to intentionally create the ice sphere 2 having a random directionality, it is preferable that the side surface is surrounded by the buffer material 5 as shown in FIG. By arranging the cushioning material 5 in this way, the launch direction of the ice ball 2 is not fixed, and the ice ball 2 changing in a random direction can be launched.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. While the first embodiment is an embodiment using a compression spring for the elastic body 6, the present embodiment shows an example using a tension spring for the elastic body 6. FIG. 6 shows a plan view of the arrangement of the ice ball launcher 18 and the solar cell panel 14 as viewed from above. In this figure, the tension springs are arranged to extend from side to side. In the case of the present embodiment, the track 16 is not a launch tube but a rail shape, and the block-shaped ice ball guide 1 is engaged. The ice ball guide 1 is installed on the track 16 so as to be linearly movable. Other basic configurations are substantially the same as those in the first embodiment.

  In such a form, since two springs are used as compared with the first embodiment, a spring having a small spring constant can be used and can be obtained at low cost. Further, when a spring having the same spring constant as that of the first embodiment is used, or depending on how the left and right are spread, the occupation space in the longitudinal direction can be further reduced. This method is effective when the experimental space is limited.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, the two springs of the second embodiment are not arranged so as to be spread left and right, but are arranged linearly as in the first embodiment, or a leaf spring is adopted as the elastic body 6, and the ice ball according to the present invention is used. It is possible to provide a mechanism for ejecting the ice ball 2 by providing the guide 1.

DESCRIPTION OF SYMBOLS 1 Ice ball guide 2 Ice ball 3 Orbit 4 Contact part 5 Buffer material 6 Elastic body 7 Rod 8 Wire 9 Chain block 10 Cutter 11 Protective cylinder 12 Protective cylinder 13 Stopper 14 Solar cell panel 15 Adapter 16 Orbit 17 Reaction force receiver 18 Ice sphere Launcher 19 Holding material

Claims (8)

In an ice ball launcher that applies a striking force to an ice ball on a straight orbit, applies a speed to the ice ball by the striking force, and launches the ice ball from an end of the orbit,
Having an ice ball guide for holding the ice ball until the ice ball is launched;
The ice ball guide is installed on the track so as to be linearly movable, and is in contact with the ice ball in a plane with respect to the linear motion direction.   2. The ice ball launcher according to claim 1, wherein the surface where the ice ball guide contacts the ice ball is formed according to a surface shape of the ice ball. 3.   The ice ball launcher according to claim 1 or 2, wherein the surface where the ice ball guide and the ice ball are in contact is formed of a buffer material.   The ice ball guide according to any one of claims 1 to 3, wherein the ice ball guide has an inner diameter substantially equal to that of the ice ball and has a smooth inner surface. Launcher.   The ice ball launcher according to any one of claims 1 to 4, wherein the ice ball guide has an adapter that can be removed, and holds the ice ball through the adapter. An elastic body connected to the ice ball guide and deformed to accumulate an elastic force;
A linear member connected to the ice ball guide or the elastic body and holding tension;
With
In the impact force, tension is applied to the linear member, and the elastic member is deformed in conjunction with the tension, and the elastic force is accumulated, so that the tension of the linear member is instantaneously released. The ice ball launching device according to claim 1, wherein the ice ball launching device is generated.   The ice ball launcher according to any one of claims 1 to 6, wherein the ice balls are launched toward a solar cell panel arranged to face each other at a predetermined interval. In the falling test method for investigating the mechanical strength of the test object by colliding an ice ball imitating a kite with the test object,
An ice ball guide that is installed on a straight track so as to be capable of linear motion and holds the ice ball in contact with the surface, exerts a striking force on the ice ball guide, applies a speed to the ice ball by the striking force, and A descending test method characterized by causing an ice ball to collide with the test object using an ice ball launching device that launches the ice ball from an end of a track.

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